[apple/libc.git] / net / FreeBSD / inet_neta.c

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996,1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: inet_neta.c,v 1.2.18.1 2005/04/27 05:00:53 sra Exp $";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/inet/inet_neta.c,v 1.3 2007/06/03 17:20:26 ume Exp $");

#include "port_before.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <errno.h>
#include <stdio.h>
#include <string.h>

#include "port_after.h"

#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
# define SPRINTF(x) ((size_t)sprintf x)
#endif

/*%
 * char *
 * inet_neta(src, dst, size)
 *	format an in_addr_t network number into presentation format.
 * return:
 *	pointer to dst, or NULL if an error occurred (check errno).
 * note:
 *	format of ``src'' is as for inet_network().
 * author:
 *	Paul Vixie (ISC), July 1996
 */
char *
inet_neta(src, dst, size)
	in_addr_t src;
	char *dst;
	size_t size;
{
	char *odst = dst;
	char *tp;

	while (src & 0xffffffff) {
		u_char b = (src & 0xff000000) >> 24;

		src <<= 8;
		if (b) {
			if (size < sizeof "255.")
				goto emsgsize;
			tp = dst;
			dst += SPRINTF((dst, "%u", b));
			if (src != 0L) {
				*dst++ = '.';
				*dst = '\0';
			}
			size -= (size_t)(dst - tp);
		}
	}
	if (dst == odst) {
		if (size < sizeof "0.0.0.0")
			goto emsgsize;
		strcpy(dst, "0.0.0.0");
	}
	return (odst);

 emsgsize:
	errno = EMSGSIZE;
	return (NULL);
}

/*
 * Weak aliases for applications that use certain private entry points,
 * and fail to include <arpa/inet.h>.
 */
#undef inet_neta
__weak_reference(__inet_neta, inet_neta);

/*! \file */
Commit	Line	Data
9385eb3d	1	/*
34e8f829 A	2	* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
34e8f829 A	3	* Copyright (c) 1996,1999 by Internet Software Consortium.
9385eb3d A	4	*
	5	* Permission to use, copy, modify, and distribute this software for any
	6	* purpose with or without fee is hereby granted, provided that the above
	7	* copyright notice and this permission notice appear in all copies.
	8	*
34e8f829 A	9	* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
	10	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	11	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
	12	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	13	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	14	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
	15	* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
9385eb3d A	16	*/
	17
	18	#if defined(LIBC_SCCS) && !defined(lint)
34e8f829	19	static const char rcsid[] = "$Id: inet_neta.c,v 1.2.18.1 2005/04/27 05:00:53 sra Exp $";
9385eb3d A	20	#endif
9385eb3d A	21	#include <sys/cdefs.h>
34e8f829 A	22	__FBSDID("$FreeBSD: src/lib/libc/inet/inet_neta.c,v 1.3 2007/06/03 17:20:26 ume Exp $");
	23
	24	#include "port_before.h"
9385eb3d A	25
	26	#include <sys/types.h>
	27	#include <sys/socket.h>
	28	#include <netinet/in.h>
	29	#include <arpa/inet.h>
	30
	31	#include <errno.h>
	32	#include <stdio.h>
	33	#include <string.h>
	34
34e8f829 A	35	#include "port_after.h"
34e8f829 A	36
9385eb3d A	37	#ifdef SPRINTF_CHAR
	38	# define SPRINTF(x) strlen(sprintf/**/x)
	39	#else
	40	# define SPRINTF(x) ((size_t)sprintf x)
	41	#endif
	42
34e8f829	43	/*%
9385eb3d A	44	* char *
	45	* inet_neta(src, dst, size)
	46	* format an in_addr_t network number into presentation format.
	47	* return:
	48	* pointer to dst, or NULL if an error occurred (check errno).
	49	* note:
	50	* format of ``src'' is as for inet_network().
	51	* author:
	52	* Paul Vixie (ISC), July 1996
	53	*/
	54	char *
	55	inet_neta(src, dst, size)
	56	in_addr_t src;
	57	char *dst;
	58	size_t size;
	59	{
	60	char *odst = dst;
	61	char *tp;
	62
	63	while (src & 0xffffffff) {
	64	u_char b = (src & 0xff000000) >> 24;
	65
	66	src <<= 8;
	67	if (b) {
	68	if (size < sizeof "255.")
	69	goto emsgsize;
	70	tp = dst;
	71	dst += SPRINTF((dst, "%u", b));
	72	if (src != 0L) {
	73	*dst++ = '.';
	74	*dst = '\0';
	75	}
	76	size -= (size_t)(dst - tp);
	77	}
	78	}
	79	if (dst == odst) {
	80	if (size < sizeof "0.0.0.0")
	81	goto emsgsize;
	82	strcpy(dst, "0.0.0.0");
	83	}
	84	return (odst);
	85
	86	emsgsize:
	87	errno = EMSGSIZE;
	88	return (NULL);
	89	}
	90
	91	/*
	92	* Weak aliases for applications that use certain private entry points,
	93	* and fail to include <arpa/inet.h>.
	94	*/
	95	#undef inet_neta
	96	__weak_reference(__inet_neta, inet_neta);
34e8f829 A	97
34e8f829 A	98	/! \file /